Apple's divisive new update to iOS 7 has caused a lot of head-scratching among developers - but an interesting tidbit from the new OS might cause a lot of head-shaking too. In a good way.
According to 9to5Mac, one of the features of iOS 7 buried in the software's accessibility options is a limited form of head-tracking, with which users can control their phone by shaking their head.
By moving your head left or right you can control different screens, use it as a home button, change the volume or tap the screen.
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While 9to5Mac says the feature is "quite tedious" it's clearly not intended for use by general users, but by those with limited movement.